Abstract: The disclosure relates to the field of artificial intelligence. Disclosed in the disclosure are a method and apparatus for detecting a malicious Portable Executable (PE) file, and a device and a medium. The method includes: disassembling a target PE file according to a preset file disassembling method, so as to acquire file header information, file optional header information, file section header information, and section information; using a trained sparse self-encoding neural network model to respectively vectorize each piece of header information, and using a trained text classification model to vectorize the section information; and fusing each vectorized vector, and inputting fused vectors into a neural network model, so as to acquire a detection result outputted by the neural network model. The neural network model is obtained by using a preset knowledge transfer method to perform model transfer on each trained sparse self-encoding neural network model and text classification model.

Abstract: A polycrystalline diamond compact including a polycrystalline diamond layer and a cemented carbide substrate. The polycrystalline diamond layer is in the form of a cylinder including an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface. The cemented carbide substrate is bonded to the bottom surface of the polycrystalline diamond layer. The upper surface includes a center part and an edge part. The edge part includes a plurality of radially distributed cutting edges and cutting removal grooves. The plurality of cutting edges and cutting removal grooves are alternately distributed on the upper surface. One end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the center part, and the other end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the side wall.

Abstract: A virtual firewall construction method based on an OpenStack framework, and a storage medium. The method includes: modifying a firewall rule of a target data packet service according to a preset rule, and obtaining a modified target data packet service, the modified target data packet service utilizes the modified firewall rule to perform data packet control, and a forwarding stack is provided in the modified target data packet service, a forwarding performance of the forwarding stack is higher than the forwarding performance of a routing service of the OpenStack framework; a firewall configuration interface is provided in the firewall rule of the modified target data packet service, and the firewall configuration interface is configured to, according to different users under different virtual networks, set a data packet processing rule meeting requirements of the users; and replacing the routing service of the OpenStack framework according to the modified target packet service.

Abstract: A bumpless transfer fault tolerant control method for aero-engine under actuator fault is disclosed. For an aero-engine actuator fault, by adopting an undesired oscillation problem produced by an active fault tolerant control method based on a virtual actuator, in order to solve the shortage of the existing control method, a bumpless transfer active fault tolerant control design method for the aero-engine actuator fault is provided, which can guarantee that a control system of the reconfigured aero-engine not only has the same state and output as an original fault-free system without changing the structure and parameters of a controller, to achieve a desired control objective, and that a reconfigured system has a smooth transient state, that is, output parameters such as rotational speed, temperature and pressure do not produce the undesired transient characteristics such as overshoot or oscillation.

Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer bonded to the cemented carbide substrate. The polycrystalline diamond layer is nonplanar and includes a central part and a peripheral part surrounding the central part. The central part includes a protruding surface relative to the peripheral part. The protruding surface is spherical or planar. The peripheral part includes a plurality of radially-disposed ridges.

Abstract: The present invention relates to a thermoplastic polyurethane composition and use thereof. The thermoplastic polyurethane composition comprises a polyurethane prepared from a polyester polyol and a polyisocyanate as well as an antioxidant. The thermoplastic polyurethane composition of the present invention can be used with other thermoplastic polymers in melt spinning process to prepare bicomponent fibers.

Abstract: A bumpless transfer fault tolerant control method for aero-engine under actuator fault is disclosed. For an aero-engine actuator fault, by adopting an undesired oscillation problem produced by an active fault tolerant control method based on a virtual actuator, in order to solve the shortage of the existing control method, a bumpless transfer active fault tolerant control design method for the aero-engine actuator fault is provided, which can guarantee that a control system of the reconfigured aero-engine not only has the same state and output as an original fault-free system without changing the structure and parameters of a controller, to achieve a desired control objective, and that a reconfigured system has a smooth transient state, that is, output parameters such as rotational speed, temperature and pressure do not produce the undesired transient characteristics such as overshoot or oscillation.

Abstract: A polycrystalline diamond compact including a polycrystalline diamond layer and a cemented carbide substrate. The polycrystalline diamond layer is in the form of a cylinder including an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface. The cemented carbide substrate is bonded to the bottom surface of the polycrystalline diamond layer. The upper surface includes a center part and an edge part. The edge part includes a plurality of radially distributed cutting edges and cutting removal grooves. The plurality of cutting edges and cutting removal grooves are alternately distributed on the upper surface. One end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the center part, and the other end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the side wall.

Abstract: A method for making a polycrystalline diamond compact. The method includes: 1) preparing a workblank of a polycrystalline diamond compact; and 2) thermally- or cold-etching the curved surface of the workblank of the polycrystalline diamond compact using laser. The thermally- or cold-etching the curved surface of the workblank of the polycrystalline diamond compact includes: employing a laser generator to produce a laser beam, expanding the laser beam, focusing the laser beam, to yield an energy concentration area on the surface of the workblank of the polycrystalline diamond compact, and etching the curved surface using the energy concentration area.

Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer bonded to the cemented carbide substrate. The polycrystalline diamond layer is nonplanar and includes a central part and a peripheral part surrounding the central part. The central part includes a protruding surface relative to the peripheral part. The protruding surface is spherical or planar. The peripheral part includes a plurality of radially-disposed ridges.

Abstract: A polycrystalline diamond compact including a cemented carbide substrate and a polycrystalline diamond layer disposed on the cemented carbide substrate. The polycrystalline diamond layer is nonplanar and includes a first curved surface, a second curved surface, and a side surface directly connected to the cemented carbide substrate. The first curved surface is connected to the second curved surface. The joint of the first curved surface and the second curved surface protrudes to form a first cutting edge. The joints of the first curved surface and the second curved surface and the side surface protrudes to form a plurality of second cutting edges.

Abstract: A polycrystalline diamond compact including a polycrystalline diamond layer and a cemented carbide substrate. The polycrystalline diamond layer is in the form of a cylinder including an upper surface, a bottom surface, and a side wall connecting the upper surface and the bottom surface. The cemented carbide substrate is bonded to the bottom surface of the polycrystalline diamond layer. The upper surface includes a center part and an edge part. The edge part includes a plurality of radially distributed cutting edges and cutting removal grooves. The plurality of cutting edges and cutting removal grooves are alternately distributed on the upper surface. One end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the center part, and the other end of each of the plurality of cutting edges and cutting removal grooves extends to communicate with the side wall.

Abstract: A method for making a polycrystalline diamond compact (PDC). The method includes: 1) preparing a workblank of a polycrystalline diamond compact (PDC); and 2) thermally- or cold-etching the curved surface of the workblank of the polycrystalline diamond compact (PDC) using laser. The thermally- or cold-etching the curved surface of the workblank of the polycrystalline diamond compact (PDC) includes: employing a laser generator to produce a laser beam, expanding the laser beam, focusing the laser beam, to yield an energy concentration area on the surface of the workblank of the polycrystalline diamond compact, and etching the curved surface using the energy concentration area.